The usual CPT rules are that a number of establishments are chosen at random from a complete list provided by the authorities. These are then subject to inspection.
In addition, places where particular problems have occurred can also be selected. In this case, some reference may be made in the report to previous concerns or complaints.
The inspections are very thorough - it is one of the things the EU actually does rather well.
Thanks for that very good answer.
I think this is important, how the stations were chosen.
Let's imagine there are 200 PJ stations.
If the 2 stations were selected deliberately because of known problems, the statistical result is that 2 out of 200 stations have this problem. 1%.
If the 2 stations were chosen truly randomly, then the statistical result, I don't know how to work it out, would be probably be something like an estimate over 50% of all stations having this problem if you see what I mean?